Question

$V_{1}ml$ of x molar hydochloric acid is mixed with $V_{2}ml$ of y molar sodium hydroxide. Arrange the following steps in correct sequence for calculation of pH of the mixture. (y > x and $V_1>V_2)$
(a) Calculation of the number of equivalent of acid and base.
(b) Calculation of the total volume of mixture.
(c) Calculation of the normality of acid and base.
(d) Calculation of the net $O{H}^{-}$ ion concentration.
(e) Taking the negative logarithm of $H^{+}$ ion concentration.
(f) Dividing $K_w$ by $O{H}^{-}$ ion concentration.

• A. a c b f d e
• B. c a b d f e
• C. c a b f d e
• D. a b c d f e

Answer 1

The correct option is B c a b d f e

(i) Calculation of the normality of acid and base.
(ii) Calculation of the number of equivalent of acid and base.
(iii) Calculation of the total volume of mixture.
(iv) Calculation of the net $O{H}^{-}$ ion concentration.
(v) Dividing $K_w$ by $O{H}^{-}$ ion concentration.
(vi) Taking the negative logarithm of $H^{+}$ ion concentration.